I've been trying to get a clone to run with no success. I can load the carb with gas and it will crank, but as soon as burns that gas it stops. It won't pull any fuel from the tank. I tried hooking up an old spare fuel pump and got the same results. The pulse line looks correct and I have wire tied all fuel lines to get the best seal that I can.

I know this sounds crazy, but have you checked to make sure the fuel shutoff valve on carb is on. The only other thing I can think of is maybe the inlet needle is stuck or old gas may have varnished over time in carb and stopped up passages._________________Kerry Wilson
Former Senior 4 Cycle Director
One of GSKA's Founders

Kerry...nothing is too crazy to check at this point! I did check and double check the cutoff and it is on. The engine was new so there hasn't been any fuel in the carb before this problem.

The only other hint I might have, is that I have to have the choke cracked slightly open to start it. There seems to be a very small range where it will fire. Too much or too little and I get nothing._________________Rotax Masters
Kosmic Mercury #602

Kevin,
If it is not pulling fuel it is prob the following
1. Pulse line is not correct
2. Hole in pulse line
3. Carb needs to be cleaned. If fuel had been sitting in the carb for months, it usually needs a through cleaning. Take it completely apart an clean with brake clean.
4. Check to make sure the carb gaskets are positioned correctly. Especially the one next to the plastic spacer between the head and carb.

Send me a PM if you want me to call you. I have a bunch of carbs that I can bring and a fuel pump. It has to be one of these. Just let me know.